package com.itheima.interceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


    //自定义拦截器
    @Component
    public class DemoInterceptor implements HandlerInterceptor {
        //controller资源方法执行前执行--->返回:true：放行    返回:false：不放行
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            System.out.println("preHandle .... ");

            return true; //true表示放行
        }

        //controller目标资源方法执行后执行
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
            System.out.println("postHandle ... ");
        }

        //视图渲染完毕后执行，最后执行的方法
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
            System.out.println("afterCompletion .... ");
        }
    }

